"USADA cannot assert control of a professional international sport and attempt to strip my seven Tour de France titles," he said. "I know who won those seven Tours, my teammates know who won those seven Tours, and everyone I competed against knows who won those seven Tours."

Armstrong's comments notwithstanding, USADA has exercised its power to sanction athletes and strip their results regularly. Its website shows that it has issued 21 sanctions in 2012 so far in sports ranging from cycling to track to boxing to judo, with 17 of the athletes losing their results.